Are you sure the heater is faulty, have you tried pressing the red reset button on the back ? If so to replace the element unplug the dryer remove the worktop write down or photograph the wiring at the terminal block and element. remove the back panel ( all screws and the 3 that hold the triangular plate centre shaft) the element is held on the inside of the back panel. remove brackets and fit new element.
Kenjo, November 2014